Forced-Air Systems

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Trouble-Free Forced-Air Heat

An hvac contractor explains how to size, select, and install furnaces and ductwork to ensure quiet, efficient, and even heating. Read more

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Adding On to Forced Hot Air

Heating an addition may require adding hot air ducts. But does the existing furnace have enough capacity to handle them? Here’s how to find out. Read more

Fine-Tuning Forced-Hot Air
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Fine-Tuning Forced-Hot Air

A heating contractor details how to upgrade from a typical bare-bones heating... Read more

Conditioning Energy Recovery Ventilators
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Conditioning Energy Recovery Ventilators

Adding a heat pump lets an ERV help with heating, cooling, and humidity control. Read more

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Zoning Forced-Air Heating Systems

An hvac contractor shows how he uses advanced controls and motorized dampers to provide balanced zone control in forced-air heating systems, in both retrofits and new installations. Read more

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Trouble-Free Forced-Air Heat

An hvac contractor explains how to size, select, and install furnaces and ductwork to ensure quiet, efficient, and even heating. Read more

Forced-Air Systems Instruction

A New Roof Poisons a Family
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A New Roof Poisons a Family

Though at first the culprit appeared to be the furnace, it turned out that the... Read more

Panned Bays
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Panned Bays

Is it OK to use a joist bay for a return-air plenum in an HVAC system? Read more

Solving for Comfort With a 'Smart' Thermostat
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Solving for Comfort With a 'Smart' Thermostat

Tracking temperature, humidity, set point, and equipment runtime can uncover the... Read more

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Q&A: One Furnace or Two?

Q: What factors must be considered when deciding whether to use a large hot-air furnace with two zones or two smaller furnaces? Read more

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Focus On Energy: Choosing a Furnace Filter

Furnace filters are not all alike Read more

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